The total cost of the computer, the lamp and the slow cooker is $400. The slow cooker costs four times as much as the lamp. The computer costs thrice as much as the total price of the slow cooker and lamp. How much less does the slow cooker cost than the computer?
| Slow Cooker |
Lamp |
Computer |
| 4 u |
1 u |
|
| 5 u |
15 u |
| 4 u |
1 u |
15 u |
Cost of the lamp = 1 u
Cost of the slow cooker = 4 u
Total cost of the lamp and the slow cooker
= 1 u + 4 u
= 5 u
Cost of the computer
= 3 x 5 u
= 15 u
Total cost of the slow cooker, the lamp and computer
= 15 u + 1 u + 4 u
= 20 u
20 u = 400
1 u = 400 ÷ 20 = 20
Amount that the slow cooker cost less than the computer
= 15 u - 4 u
= 11 u
= 11 x 20
= $220
Answer(s): $220
